Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53389547b7c9ad6da2683e5178b8e937d826e0df859d43f55e6996bb52eba523' 
  AND token = 'YelBgg1lDymMD6PctDPOP81JhPQegkECKMrRtCZWMQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}